A183745 Number of (n+1) X 7 0..2 arrays with equal numbers of 2 X 2 subblocks with sum over 4 and with sum under 4.

639129, 829488619, 1426003404195, 2669694620697299, 5196551724167646157, 10344463877985567114685, 20903404048556272844034529

Offset

1,1

Comments

Column 6 of A183748.

Links

Table of n, a(n) for n=1..7.

Example

Some solutions for 3 X 7:
..0..0..0..1..1..0..2....0..0..0..1..2..0..0....0..0..0..1..0..1..0
..0..0..0..1..1..2..2....0..0..0..2..2..2..2....0..0..0..2..2..2..1
..0..0..2..2..1..2..2....0..0..0..2..0..2..1....0..0..0..2..2..2..2
...
...M..M..M..E..E..P.......M..M..M..P..P..E.......M..M..M..P..P..E...
...M..M..P..P..P..P.......M..M..E..P..P..P.......M..M..E..P..P..P...

Crossrefs

Sequence in context: A237903 A250674 A210142 * A113951 A257194 A257187

Adjacent sequences: A183742 A183743 A183744 * A183746 A183747 A183748

Keyword

nonn

Author

R. H. Hardin, Jan 06 2011

Status

approved